The tankers were attacked when the drivers and crew were having tea at a roadside restaurant.

"Two drivers and a member of the restaurant staff were wounded and 10 NATO oil tankers were burnt when about two dozen armed gunmen opened fire at them," local police official Mohammad Hashim told AFP.

Hashim said that it was too early to say who could be behind the attack, but Taliban and al Qaeda linked militants frequently launch such attacks across Pakistan.

He said no group had yet claimed responsibility for the attack.

Local government and intelligence officials confirmed the attack.

Copyright AFP (Agence France-Presse), 2011